Locking device for automobiles



April 24, 1928. 1,667,584

M. J. CHAPLIN LOCKING DEVICE FOR AUTOMOBILES Filed March 11, 1927 2 Sheets-Sheet 1 INVENTOR.

ITI. .J. BHHF'LIN ATTORNEY April'24, 1928. 1,667,584

M. J. CHAPLIN LOCKING DEVICE FOR AUTOMOBILES Filed March 11, 1927 2 Sheets-Sheet 2 [III 1111/11/11 7' VINVENTOR.

ITI. J. CHHPLIN BY mym ATTORNEY ing the emergency brakes,

Patented Apr. .24, 1928.

UNITED" STATES PATENT OFFICE.

'MAN'L Y J. oHAr IN, 0F BERKELEY, CALIFORNIA.

I LOCKIN DEVICE FOR, AuroMoBrLEs.

Application filed nar hii, 1927i. S eria1 No.' 174,599.

This invention relates to' improvementsthe market without materially altering the vconstruct-ion of the same. v

A further object is to produce a device of this character which may be readily attached to a motorvvehicle thereby making anecdnomic'al installation. A still further obj whereby the locking mechanism cannot be easily tampered with. Other objeets'and advantages'will beapjparent during the course ofthe-following description. I i

'In the accompanying drawings forming apart of this specification, and in which like numerals are employed to designate like parts throughoutthesame, 1 Figure I is a side elevation of a transmission housing showing the pedal arrange; ment,

. Figure Figure III is a front elevation of the locking lever and locking dog partly shown-1n cross-section, 3

Figure IV is showing the locking dog, 7

Figure V is a vertical cross-section of the locking housing and cam, I

Figure V1 is a vertical cross-section of the looking housing and locking mechanism taken at right angles to that of Figure V, and i Figure VII is a rear elevation ofthelocking housing. 1 V 5 On motor vehicles of the Ford type a side lever is employed for the purpose of apply: and at .the same time this side lever when placed in neutral position-also throws the gear mechanism to neutral position. jv V i I have eliminated this side lever through a novel arrangement and have substituted therefor a locking mechanism which will accomplish thesame purpose as the side lever and further will be capable of being locked. In the accompanying drawings wherein for the purpose of illustration Shown a cot is to provide means. to whichis pivoted a link 1 p i 1 I a fitting II is a top plan ViEW of Figure I,-

a fragmentary detail View site end of the rocker arm to an extension 1 ing a ratchet 36.

' 1 Lock nuts 47 serve to numerals?) and Gi'efer to the chassis frame between which is positioned the customary gear hous ng 7. Extending through the'gear housin'g are three parallel shafts 8, 9 and ll.

These shafts serve to operate friction bands preferred embodiment of myinvention, the

within the housing 7 the construction of which is well own to anyone familiar; with the art.

The shaft 8 controls-the reverse band, the shaft 9 the low speed band and. the shaft 11 the brake band. i move the'brake band leaving the shaft free to rotate and not perform any function within the transmission housing.

lVith my invention I re-' Tothe brakepedal 12 I attach a lever 13 V downwardly and is connectedto a lever 16 'whichis in turn clamped to arocker bar 17 This rocker bar extends between the chassis frames 5 and "6 and is j'ournaled therein.

which extends his rocker bar serves to operate the cus tomary emergency brakes of the motor vehicle through the medium of brake rods one of which isishown at 18, in FigureIV.

. T he lever 16 has an offset armi19 to which is pivoted a rod 22 positioned within thebifurcated end of 23. This fitting is secured by a bolt 24: to a rocker. arm 26 mounted'upon a shaft 27. This shaft extends into the trans mission housing and operates the customary clutch. 1 1

An adjustable link 28*connec'ts the oppo- 29 of the low speed pedal31. Secured to the outer extremities of depending arms 32; one ofwhich is shown in FigurefIV, the lower extremity of which arms are bifurcated'so as to havejpivoted thereinas at '33, the brake rods, 18. Upon V I form a segment 34 havone of these arms,

This ratchet is in turn engaged by the nose of a. do'gf37 pivoted as at 38 to a brace 39 attached to the frame 5.

A cover plate is shownat t1 and serves to positionth'e lower extremity of a lockingrod 42. This rod carries'a nut 43 against which a spring 44 abuts. The lower extremity of 21 having a squared head I the rocker'bar 17 are this spring contacts a lug-46 secured to the dog 3 1 gages a cam 51. This cam is positioned retain the rod in" enhead 48 having a nose 49 whichenwithin a housing comprising a back plate 52 upon which is formed a hub 53. This hub serves to position the cam 51.

A cover plate is shown at 54:.and hasan opening therein through which the hub 53 as well as the hub 56 of the cam extends.

The hub of the cam is screw threaded so as to have positioned thereon the ring 57 of the pivoted handle 58. This handle is heldto the hub against rotation by a pin 59.

Positioned within the hub 53 is a lock 61,

operated by a'key 62.v The cylinder of this lock is provided with a'boss 60 which lies within a yoke 63 carried upon an oiIset lever 64 pivoted as at 66 to the back plate 52. A yoke 63 has an arm 67 which is adapted to be projected into an opening} 68 formed into the cam hub 56.. v

' The result of this construction. is that when the lever 8 is rotated so to throw the locking rode-2 downwardly, pressure is exerted upon the spring 44, which pressure is transmitted to the dog 37, therefore if the brake pedal is depressed, motion will be transmitted so as to cause the rocker bar 17 to move thereby tightening the brakes by pulling upon the brake rods 18. As this happens, the ratchet teeth 36 passing beneath 'the'nose' of the dog 37 will prevent retrograde movement of the rocker bar. At the same time upward movement of the rod 21 will cause a rocking, action otthe rocker bar 26 thereby rotating the shaft 27, releasing the clutch and through the action of the adjustable link 38 it will move the pedal 31 to neutral position;

If the key 62 is now inserted in the lock and rotated the boss will cause the yoke 63 to move so as to project the hub 67 into the opening 68 which will prevent rotation of the hub 56 in the cam 51, thus locking the machine against movement.

'IVhen the lever 58 is moved to unlocked position, the result will be that the dog 37 will be raised thereby moving the nose out of the path of movement of the ratchet teeth 36 after which the vehicle may be operated.

In pressing upon the low speed pedal 31, the brakes will not be actuated through the fact that the pin 25 is at the lower end of the slot 30 and consequently the fitting 23 will merely slide downwardly upon the squared head 22, of the rod-21.

IVhen it is desired to stop the motor vehicle without locking the same, pressure upon the brake pedal will perform the function above set forthwith the exception that the dog37 will be out of operating position and consequently the only action taking place will be the braking and the throwing of the clutch into neutral position.

It will thus be seen that I have produced a device which will not only permit the car to be more easily operated in that one foot willcontrol. the'brakingv action, and at the same time place the car in neutral position, but I have further provided means for looking the car in thiscondition when desired.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes relative to the size, shape, material'and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, 1 claim: l

1. In a motor vehicle, a rocker bar'adapted to actuate the brakes of a motor vehicle, a lever secured to said rocker bar, means for connecting said lever to the brake pedal of said motor vehicle, a ratchet positioned on said rocker bar and means for locking said ratchet against retrograde movement.

2. The comb nation with motor. vehicle brakes of said motor vehicle, of a ratchet secured tosaid rocker bar, a dog adapted to bemoved into engagement with said ratchet, means for actuating said dog and for looking said last mentioned means forthe purpose specified.

having a rocker bar adapted to actuate the I 3. In a device of the character described, a

rocker bar adapted to actuate the brakes of a motor vehicle, a. lock housing remotely positioned with respect to said rocker bar, a cam positioned within said housing, a locking rod actuated by said cam, a lock positioned withp in said housing, for the purpose of locking said rod against movement, a dog capable of being moved by said rod, 'a ratchet in align ment with saiddog and adaptedto be contacted thereby, said ratchet being positioned upon said rocker bar. I

4. In a device of the character described, a rocker bar adapted to actuate the brakes of a motor vehicle, a lock housing remotely positioned with respect to said rocker bar, a cam positioned within said housing, a looking rod actuated by said cam, a lock positioned within said housing, for the purpose of locking said rod against movement, a do capable of being moved by said rod, a

MA NLEY J- CHA N- 

